Sifter.



170.8711973. PATENTED PEB. 11, 190e. .11. 11. MARLOW.

SIPTER.

APPLIGATION FILED 11111.11, 1907.

' y 2 SHEETS-SHEET 14 No. 878,973. PATENTED. FEB.. 141, 1908.

C. D. MARLOW.

SIFTER.

APPLICATION FILED JAN.11. 1907.

2 SHEETS-SHEET 2. l

l 'mi Nankls Psrsns co., wAsmNoraN, n. c.

CLARENCE DURBIN MARLOW, OF DUNELLEN, NEW JERSEY..

SIFTER.

Specification of Letters Patent.

Application filed January 11| 1907. Serial No. 351.781.

Patented Feb. 11, 1908.

T o all whom it may concern.

Be it known that l, CLARENCE DUEBIN MARLOW, a citizen of the United States, residing at Dunellen, in the county of Middlesex and State of New Jersey, have invented new and useful Improvements in Sifters, of which the following is a specification.

The invention relates to an improvement in ash sifters, comprehending specifically a construction including means for readily and effectively separating the cinders or the like from the fine ash.

The main object ofthe present invention resides in the provision of a conveyer for the initial reception of the refuse, and in a specific construction of delivery means arranged to receive the conveyer and to be operated. to deliver the material from the conveyer to the sifting mechanism7 whereby the delivery of the refuse to the sifter is provided for without the disadvantage ofthe dust incid ent to the usual method of delivery.

Another object of the invention is thepro vision of independent chambers within the sifter designed respectively for the reception of fine ash and cinders, the construction including a manually operable means whereby the refuse from the sifting cylinder may be directed into either chamber at will.

The invention will be described in the following specification, reference being had particularly to the accompanying drawings, in which :d

Figure 1 is a perspective view of an ash sifter constructed in accordance with my invention, Fig. 2 is a vertical central section of the same, Fig. 3 is a transverse verticalsection of the same, Fig. 4 is a broken perspective illustrating the conveyer receiving cradle, Fig. 5 is a broken perspective of the conveyer, Fig. 6 is a broken perspective of the siftingvcylinder and refuse directing plate, Fig. 7 is a section on line 7 7 of Fig. 6, Fig. Sis a broken transverse section showing a modiiied form of outlet from the refuse chambers, Fig. 9 is a longitudinal section on line 9 9 of Fig. 8.

Referring particularly to the drawings,

wherein similar reference numerals indicate like parts throughout the several views, my improved ash sifter comprises a casing 1, preferably, though not necessarily, rectangular in contour and having side walls 2 and end walls 3. The casing 1 is provided with a cover section 4, hinged or otherwise removably connected to the casing in manner to provide a dust tight connection when the cover section is in place. The side Walls of the cover section are upwardly and inwardly curved for a portion ot their length, as at 5, being then projected vertically in a plane parallel to the side walls of the casing, as at 6. The arrangement of the relatively vertical portions 6' of the side walls of the cover section provides a rectangular` delivery section 7 disposed centrally above the mainbody 1, and co-extensive in length with the length of the main body. The delivery section is `also provided with a cover 8, hinged or other- Wiserremovably secured to said section, rand preferably approximately semi cylindrical in transverse section, the juncture of the cover 8 and section 7 being such as to provide a dust tight connection when the cover is closed. j

-Fivotally sup orted within the delivery section is what a concaved strip 10 approximately equal in term a cradle 9, comprising length to the similar interior dimension of the delivery section, said cradle being pivot ally supported upon pins 11 mounted in the end walls of the delivery section, one of the pins being projected beyond the proximate wall of the delivery section and bent to provide an operating handle 12, whereby the cradle may be rocked within the delivery section. The endwalls 14 of the cradle are each provided with a latch member 15, formed at the relatively upper end with an inwardly projecting lip 16, said'latch mem` bers being loosely mounted upon the pivot.

pins 11 of the cradle.

In normal position the side edges of the cradlebottom or strip 10 are disposedy below the relatively' upper edges of the walls of the delivery section, and through the side Walls of `said section in approximate alinement with the free edges of the cradle bottom in normal position I arrange stop pla-tes 17 secured at their lower edges to the interior surface of the walls of the section and projected therefrom at an upward and inward incline. The stop plates are so arranged as to bear with slight frictional engagement upon the rcradle-bottom in the `operation of the latter, serving at the same time to limit the rocking movement of the cradle, it being obvious that in said rocking movement either edge of the cradle bottom would engage the relatively opposite stop plate and prevent further `movement of the cradle in that direction. The relatively upper edges lso of the stop plates 17 are arranged a slight distance above the free edges of the cradle bottom when the latter is in normal position, thereby effectively sealing the juncture between the stop plate and cradle bottom to prevent passage of dust therethrough. Guard plates 18 areconnected to the respective end walls of the delivery section, being shaped to conform to the curvature of the cradle bottom and fitted snugly beneath the latter, lthereby preventing the passage ofv dust between the end walls of the cradle and the end walls of the delivery section, it being understood that said guard plates are to be so arranged as to permit the operation of the cradle to be presently described.

Themain body or casing 1 is divided into two chambers, a fine ash chamber 19, and a cinder chamber 20, by a longitudinally extending partition 21, the respective ends of which are secured to the end walls 2 of the body 1.

A screen or sifting cylinder 22 is rotatably supported within the body or box 1 immediately above the partition 21. The cylinder comprises ends 23 marginally connected by an appropriately shaped strip of screen cloth or the like 24. The relatively upper edges of the ends 23 in the normal position of the cylinder are flattened, as shown, this flattened portion of the ends being without the application of the screen material, thereby providing an entrance opening 25 to the cylinder. It is, of course, to be understood that the screen cylinder maybe braced or otherwise reinforced by the use of suitable metallic strips' or the like, whereby to insure the efficient operation of the cylinder under all uses to which it may be subjected, and preventing any tendency of the weight of the refuse to break the screen cloth.

The cylinder 22 is of somewhat less diameter than the transverse dimension of the box 1, and the upper edges of said box are provided with inwardly projecting guard flanges 26, terminating at their relatively inner or free edges a slight distance from the surface of the cylinder. The entrance opening 25 of the shifting 'cylinder is somewhat less in width than the transverse dimension of the delivery section of the cover 4, and said cover at the juncture of the walls 5 and 6 is provided with downwardly inclined guard flanges 27, terminating at their inner edges in alinement with the side edges of the entrance opening 25 to the cylinder, whereby all material delivered in the operation of the cradle is o sitively directed into thescreening cylin er.

The screening cylinder is pivotally su ported upon trunnions 28, mounted in t e end walls 3 of the box 1, `one of which trunnions is extended beyond the proximate end wall 3 and may be shaped to provide a handle 29, or may be squared for the reception of a rant plate 31 is provided with a sleeve exten` sion 32 designed to project through the a proximate end wall of the box 1 and encirc e and su port the cylinder trunnion. Beyond the end) plate the sleeve 32 is connected to an operating handle 33, whereby movement may be imparted to the directing plate at the will of the operator. The outer surface of the end wall 3 adjacent the handle 33 is provided with stops 34 and 35 arranged in the o erative plane of the handle, and so dispose relative to the latter that said handle may be secured in position to maintain the directing plate as a closure for either chamber 19 or 20 as desired, the construction of the handle and stops providing for the convenient cooperation or disengagement under manual operation.

The directing plate 30 is of such transverse dimension as to completely close the entrance to either com artment 19 or 20, 'as desired, the relative y upper edge of lthe plate bearing beneath one of the flanges 26, while the opposing edge overlies and projects slightly beyond the partition 21, as clearly shown in Fig. 3. The screen cylinder is rovided with a scraper 36 projecting radially therefrom and adapted to lightly engage the relatively upper surface of the directing plate 30,whereby to scrape any ashes accumulating on said plate in the operation of the cylinder and direct the same into the open compartment.

One end plate 23 of the cylinder is provided with a projecting pin 37, offset from the pivotal support of the cylinder and designed in the rocking movement of the latter to engageboth edges ofthe quadrant end plates 31 of the directing plate 30. By this particular arrangement I am enabled to so imit the rocking movement of the cylinder Athat when the directing plate is in position 'portation within the cradle 9, with the end walls 46 vided with exit openings 38, arranged in the relatively lower portion of the end wall 3 of the box, which openings are closed by doors 39, preferably rovided on their innersurfaces with boxlke extensions 40 correspond ing in sectional dimension to that of the openings 38 and having their side walls inwardlyV inclined to insure dust proof frictional engagement with the edges of said opening. Inclined guard plate 41 project inwardly from the end wall 3 above the exit openings, said plates extending from the side walls of the box to the partition, and materially facilitating the removal of the refuse, as will be obvious.

To prevent accumulation of the material about the exit openings and to avoid interi ference with a proper closing of the doors 39, I provide adjacent each exit opening a dumping section 42, comprising a plate-lil e member hinged to the bottom of the box in rear of the door opening, the relatively upper or free edge of said plate being designed to rest at all times against the door. The side edges of each plate 42 are provided with rearwardly extending wings 43 designed to operate at all times in rear of guide plates 44 secured at their relatively rear edges to the side walls 2 and the respective sides of the partition 21. The use ofthe wings 43 and guide plates 44 prevent the passage of material beyond the plates 42, while the latterv serve in the closing operation of the door to direct any material accumulating thereon rearwardly beyond the door.

In connection with the construction described, and as a material part of the present invention, I provide a means whereby the ashes in their initial state may be delivered tothe screening cylinder without the necessity of the esca ing dust incident to the usual means of delivery. In attaining this end I provide what I term a conveyer or carrier 45, comprising approximately cylindrical end Walls 46 connected by a rounded bottom plate 47 open in the relatively upper portion to provide for the initial insertion of the refusei The relatively lower portionof the carrier is preferably iiattened at 48, to insure a stable upright position of the carrier to initially receive the material. The carrier is also provided with a movable bail or handle 49 to provide for its convenient trans- The carrier is of a size `to fit state is depositedin the carrier to the extent desired, and the latter placed in the cradle and the latches 15 turned to cause the lips 16 to engage the upper edges of the end walls of the carrier. The' cover 8 is, then closed, and

the handle 12 rotated to direct the material i from the carrier into the screening cylinder, it being understood that said cylinder, either through the weight of the handle 29, or by the use of auxiliary weights if desired is so mounted as to maintain the entrance opening 25 normally in position to receive the material from the carrier. The handle 33 is now operated to close the cinder compartment 20, in which position, as before described, the rocking of the screening cylinder is so limited as to prevent discharge of its contents through the opening 25. The cylinder 22 is operated until the fine ash has been effectively separated from the refuse, such material finding its Way into the chamber 19. The handle 33 is then moved into cooperation with the stop 35, thereby closing the chamber 19 and opening the chamber 20. The screening cylinder may be now turned so as to discharge its contents into the chamber 20, whereupon a complete separation of the refuse into fine ash and cinders will have i been effected, and the accumulation of these respective materials within the chambers 19 and 20 ready for withdrawal through the exit openings.

In Figs. 8 and 9 are shown a modified form of exit or delivery openings, wherein the chambers are provided with hopper bottoms 50 closed by sliding doors 51. The discharge points from the hopper bottoms may be arranged at any point longitudinally of the chambers and the doors 51 may be hinged or otherwise connected for operation.

The important feature of this invention resides inV the means whereby the material is initially delivered to thesifter, the particular arrangement and construction of such means, as herein shown and described, absolutely insuring the delivery of such material to the sifting cylinder without the possibility of escaping dust.- Furthermore, the remaining structural featurespf the device are directed to preventing the escape of dust during the operation of the sifter, whereby I am ena led to rovide an absolutely dust proof sifter in afl) conditions of operation; Whilepreferring the s ecific construction herein shown and descri ed, it is to be understood that I do not limit myself thereto, as various changes and modiiications may be resorted to without materially affecting the purpose or operation of the device, and I consider as within the spirit of the presenty invention all such changes and variations as may fall Within the scope of the appended claims.

Having thus described the invention what is claimed as new, is

1. A sifter including a sifting cylinder, a cradle mounted above the cylinder, said cradle being adapted for dumping movement in either direction, a carrier arranged to be supported within the cradle, and means for locking the carrier in place therein, said locking means coperating With the carrier at the ends thereof.

2. A sifter comprising a box-like body, a screening cylinder revolubly mounted Within the body, a cradle movably supported above the cylinder and adapted for dumping movement in either direction, means for operating the cradle, a refuse carrier designed to be inserted Within the cradle and means carried by the cradle for engaging the carrier and securing the same in iiXed relation to the cradle.

3. A sifter comprising a box-like body, a cover section therefor, said section being formed With a rectangular extension arranged above the body and open at the top, a screening cylinder revolubly mounted Within the body, a cradle mounted Within the eX- tension and adapted for dumping movement in either direction, a carrier removably inserted Within the cradle, means carried by the cradle for engaging the carrier to secure the vformed With an opening revolubly mounted Within the body, and a directing plate operable to lclose either chamber, a pin projecting from the cylinder, and means carried by the directing plate to limit the movement of the pm.

6. A sifter comprising a box-like body divided into tWo chambers, a screening cylinder mounted Within the body and adapted to direct the material into either chamber, a stop carried by the cylinder, and means to close either chamber against the cylinder, said means serving When in position to close either chamber to limit the movement of the cylinder though engagement of the stop With the closing means.

7. A sifter comprising a box-like body divided into two chambers, a screening cylinder mounted Within the body and formed With an opening arranged to direct the material into either chamber in accordance With the direction of rotation of the cylinder, and manually operable means to close either chamber against the cylinder opening, said means being adapted when in position to close one chamber to also limit the movement of the cylinder to prevent discharge of the material through the opening thereof.

In testimony whereof I aflix my signature in presencevof tWo Witnesses.

CLARENCE DURBIN MARLOW. l

y Witnesses:

JOHN L. FLETCHER, D. W. GoULD. 

